Thru-Hardened and Structural Flat Washers

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Thru-hardened and structural flat washers are heat-treated for use under high-strength bolts and nuts, distributing clamp load and preventing embedment in structural and heavy machinery connections. Blue Ribbon Fastener stocks thru-hardened washers in F436, SAE, and USS patterns for structural and grade-matched bolting.

Order by 2:30PM (CST) for same-day shipping! Repeat and volume customers, call or request a quote for the best possible pricing.

S.A.E. for Gr-9 applications, EcoGuard Gray/Silver

U.S.S. Extra Thick, Plain

U.S.S. for Gr-9 applications, EcoGuard Gray/Silver

Usages for Thru-Hardened and Structural Flat Washers

These washers are used under Grade 5, Grade 8, and structural bolts (A325/A490) where a standard flat washer would deform or embed under high clamp loads, common in structural steel connections and heavy equipment assembly.

Thru-Hardened and Structural Washers for all Industries

Structural construction, heavy equipment manufacturing, and industrial machinery assembly all specify thru-hardened washers to pair with high-strength bolting. Blue Ribbon Fastener supplies washers matched to your bolt grade and specification.

Shop Thru-Hardened and Structural Washers by Type:

F436 Round Structural, Plain — for A325/A490 structural bolt connections
S.A.E. Thick Heavy Duty, Zinc Yellow — Made in USA
S.A.E. for Gr-5 & Gr-8 applications, Zinc Yellow
U.S.S. Thick Heavy Duty, Zinc Yellow — Made in USA
U.S.S. for Gr-5 & Gr-8 applications, Zinc Yellow
Same-day shipping on in-stock sizes when ordered by 2:30 PM CST
Volume and repeat customer pricing available — call or request a quote

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Thru-Hardened and Structural Flat Washers

Usages for Thru-Hardened and Structural Flat Washers

Thru-Hardened and Structural Washers for all Industries

Shop Thru-Hardened and Structural Washers by Type:

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